Wang 2262 User manual

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WANG .
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X-Y DIGITIZER
NOTES
· Model: 2262
• Customer Engineering
Product Maintenance Manual
3601
729-0536-A

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PREFACE
Second Edition (January, 1984)
This publication applies to the Wang Model 2262 X-Y Digitizer. Material
in this publication is reprinted from and obsoletes 729-0536 and 729-0535.
Updates and/or changes to this document will be published as Publication
Update Bulletins (PUBs) or subsequent editions.
This document is the property of Wang Laboratories, Inc. All information
contained herein is considered company proprietary, and its use is restricted
solely for the purpose of assisting the Wang-trained CE in servicing this Wang
product. Reproduction of all or any part of this document is prohibited
without the prior consent of Wang Laboratories, Inc.
@Copyright WANG Labs., Inc. 1975, 1984
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SERVICE
BULLETIN
EDITED BY CUSTOMER ENGINEERING DIVISION
MODEL 2262 X-Y DIGITIZER
TABLE OF CONTENTS
1.
INTRODUCTION
1.1 General
1. 2
Description
1. 3 Model 2262
Specifications
2.
INSTALLATION
3. OPERATION
3.1 Controls
and Indicators
3.2
Digitizing
Components
3.3
Principles
of Operation
3.4
Modes of Operation
3.5
Digitized Readout Format
3.6
Tablet Magnetizing
4.
MODEL 2262 DIAGNOSTIC
5.
ELECTRICAL COMPONENTS AND TROUBLESHOOTING
5.1 Components
5.2
Troublsehooting
APPENDIX A-
WIRING & SCHEMATICS
APPENDIX B-
APPENDIX C-
SIGNAL MNEMONICS
MODEL 2262 DIAGNOSTIC
NOTICE:
This document is the property of Weng Laboratories, Inc.
Information contained herein is considerad company propri·
etary 1nformat1on and its use is restricted solely to the
purnosa of assisting you in sarvic1ng Wang products. Repro-
duction of all or any part of this document is prohibited
without the consent of Wang Laboratories.
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( )LABOF!ATOF!IES, INC.
w ANG 131 NORTH STREET, TEWKSIURV, MASSACHUSETTS 01171.TEL.Ul1711161-4111, TWX 710 :IQ.l7tl, TELEX M-7"21 Printed
in U.S.A.
13-210~

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MODEL 2262 X-Y DIGITIZER
1. I NT RO DUCT ION
1.1 GENERAL
A digitizer is a device which is used to locate the positions of
points on graphic media such as strip charts, graphs, photos, engineering
drawings, and other documents, and convert them into digital information
(in the form of cartesian coordinates) which can be transmitted to the
computer for storage and analysis. The data generated in this way can
be processed and analyzed in the computer, stored out on disk or tape
for future use, or used to replot all or part of the original document
to any desired scale.
1.2 DESCRIPTION
The Wang Model 2262 X-Y Digitizer consists of a hand-held cursor
and pen stylus, either of which may be used to trace the data; a digitizer
tablet, on whose surface the document to be digitized is placed; a digitizer
chassis, containing the power supply and all necessary electronics for the
digitizer; and an Interface Controller Board, used to interface the digitizer
to the System 2200. A remote audio annunciator is available as an option;
the annunciator emits an audible "beep" each time a point is digitized,
thus providing audible verification that the digitizer is operating
properly.
The cursor and pen stylus, digitizer tablet and digitizer chassis
are manufactured by Sununagraphics Corporation of Fairfield, Connecticut.
The 2200 interface controller board is a 6592 PC which is the Model
2252A interface.
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The :22b2 Dig~tizcr is available in three models. The Model 2262-1
pruvides a digitizing tablet 20 inches x 20 inches (50.8 cm x 50.8 cm) in
size; the active digitizing area of 400 square inches (2,810 square
centimeters) should prove adequate for most applications. For large-scale
applications, tYo larger models are available. The Model 2262-2 offers
an active digitizing area 30 inches x 40 inches (76 cm x 101.6 cm) in size;
the Model 2262-3 provides an area 36 inches x 48 inches (91.4 cm x 121.9 cm)
in size.
Each digitizer is shipped with two digit1zing implements, a harid-held
cursor with a bull's eye sight, and a pen stylus. The two implements arr•
designed for different types of applications, the cursor being particularly
valuable for jobs which demand a high degree o~ accuracy, while the pen
stylus is most useful for high-speed data entry or rough digitizing work
where high-speed manual operator movement is desirable. The pen stylus
is activated by depressing it against the tablet surface, causing the
inner shaft to retract and activate the digiti?.er logic. Similarly,
the cursor is activated with a Z-axis pushbutton. In addition to the
standard Z-axis pushbutton, the cursor provides three special button~
called "flag buttons", which also can be used to digitize points. Each
flag button generates a standard readout for the point digitized, but
also sets a unique flag bit in the first digit of the readout number. The
flag buttons are therefore quite valuable for signalling special conditions
or operdtions to the controlling pro~ram, such as rolling the axis, term-
ination of job, pen up or pen down on the plotter, etc.
1.3 MODEL 2262 SPECIFICATIONS
Resolution:
100 lines/inch
Linearity:
.08% of full scale
Accuracy:
Less than .01" (.025 cm)
Repeatability:
Less than .01" (.025 cm)
Stability:
Less thn.n . 01" (. 025 cm)
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Repetition Rate: 200
coordinate pairs maximum
Origin:
Lower left corner
Tablet Sizes:
2262-1
2262-2
2262-3
20" x 20" (50.8 x 50.8 cm)
30" :it 40" (76. 2 x 101. 6 cm)
36" x 46" (91.4 x 121.9 cm)
Electrical Requirements:
Operating Environment:
2. INSTALLATION
115 VAC 60 Hz
220 VAC 50 Hz
Temperature
50° to 90°F (10° to 30°C)
Humidity
20% to 90%
Background Magnetic Field
20 gaus maximum
Remove the digitizer chassis from its shipping box. Remove both
the top cover and the bottom access panel on the chassis. Check that
the four ribbon cables have not unplugged during shipment. The two
ribbon cables that plug
into the
top of the motherboard come from the
power supply and should be taped
to the clock card
(card in the rear
the chassis)
in such a way
as to
apply pressure to
the connectors on
motherboard.
The preamplifier and the pulser
amplifier ribbon cables
of
the
plug into the bottom of the motherboard; they have stress bends in them
to keep the pins tight in the connectors. Check that the front panel
indicator lights are connected; insure that the connector on the rear
of the motherboard is secure.
Remove the tablet and magnet from their boxes; place the tablet
on a flat surface. Bias the tablet as follows using Figure 1:
(Cover tablet surface with paper to keep magnet from marking.)
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FIGURE 1
1) Hold magnet as shown. Arrows on magnet must point toward the
tablet surface.
2) With magnet against surface of tablet, wipe diagonally from upper
left to lower right.
3) Once the tablet is biased, the magnet must be removed from the
general area of the tablet; do no:~ store magnet near the tablet.
4) Check the 6592 controller board for the proper device address: SA.
5) Select a 10 digit code by depressing the 8 and 2 dato'! switches on the
6592 board. No other switches should be depressed at this time.
However, note that if the SIGN switch ts depressed, the sign of the
point being digitized will be plus (+) •
6) Insert the 6592 board into an I/O controller slot in the 2200
CPU.
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7) Plug the tablet 5 pin male connector into the lower left female
connector tn the rear of the digitizer chassis.
8) Plug the cursor into the lower right connector on the front of
the digitizer chassis.
9) If the annunciator option is included, plug this into the upper
left connector on the rear of the chassis.
10) Plug the I/O cable into the 6592 I/O controller and apply power
to the digitizer.
11) Run diagnostic test per Section 4.
3. OPERATION
3.1 CONTROLS AND INDICATORS
3.1.1 Controls
(a) Power - When pushed in, turns on power.
(b) Single Point, Switch Stream, Switch Stream -Three pushbutton switches
used to select one of the three modes of digitizer ~peration. The
switches are ganged so that depressing one button releases one of
the others. A brief description of switch operation is:
Single Point -Each depression of the cursor buttons or pen stylus
sends one point to the 2200.
Switch Stream -A continuous stream of points is sent to the 2200
when the cursor buttons or pen stylus is depressed.
Switch Stream -A continuous stream of points is sent to the 2200
at all times.
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(r) Clear -Momentary pushbutton that resets and clears the digitizer
• data registers.
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(d) Stream Rate Slider Bar - Determines the rate at which the digitizer
generates coordinate points when the digitizer is used in the stream
modes. In the extreme low position, the rate is approximately 5
point::;/second; at the extreme high position, the rate is approximately
200 points/second.
3.1.2 Indicators
(a) 2200 Ready Light - Illuminates when the 2200 is ready to receive
digitizer data. Digitized points cannot be sent to the 2200 unless
the light is illuminated.
(b) Pange Light - Illuminates when the cursor or pen is positioned to
produce a range error. A range error is generated when the cursor
(c)
or pen is raised more than .25" (.64 cm) from the tablet or positioned
on the tablet beyond the extremities of the digitizer grid and an
attempt is made to digitize. When a range error is generated,
digitizing to the 2200 is i.'.hibited.
Prox light -The proximity light is the converse of the range light
and illuminates when L!-.e cursor or pen is within . 25" (. 64 cm) of
the tablet and within the active digitizer grid. The proximity
light is inactive in the Single Point Mode.
3.2 DIGITIZING COMPONENTS
3.2.l Description
(a) Four Button Cursor -The cursor contains a bull's eye reticle, a
large square Z-axis pushbutton and three smaller i:'LAG pushbuttons.
Single or .. cream points are primarily digitized by depressing the
Z-axis pushbutton. The Flag pushbuttons cause special bits to be
• transr.iitteJ to the 2200 CPU controller along with the digitized
data.
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